Children’s language proficiency, teacher’s language ideologies, and language practices such as code-switching have been previously investigated, but almost no research has explored young children’s understandings about language(s) nor their impact on social relationships. Researchers have not investigated children’s reflection of their own language use and identity. I conducted an ethnography regarding language practices, knowledge, and identity construction, supplemented by semi-structured interviews with students and teachers in a Montessori preschool classroom. I decided to focus upon a few specific students in the class because of their varying linguistic backgrounds. Linguistic identity formation occurs mainly through self-assessment and language practices and processes (such as authentication vs. denaturalization, adequation vs. distinction, and authorization vs. illegitimation) (Bucholtz & Hall, 2005). Understanding and knowledge about language(s) displayed by students allowed for nuanced identity construction through conversation with teachers and peers. The language ideologies and practices by teachers in this classroom contrast that of the broader social and cultural systems in place, and also support children’s language knowledge and social development.